Impact of global ocean model resolution on sea-level variability with emphasis on interannual time scales
International audience Four global ocean/sea-ice simulations driven by the same realistic 47-year daily atmospheric forcing were performed by the DRAKKAR group at 2°, 1°, ½°, and ¼° resolutions. Simulated mean sea-surface heights (MSSH) and sea-level anomalies (SLA) are collocated over the period 19...
Published in: | Ocean Science |
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Main Authors: | , , , , , , , |
Other Authors: | , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2010
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Online Access: | https://hal.science/hal-00494985 https://hal.science/hal-00494985/document https://hal.science/hal-00494985/file/os-6-269-2010.pdf https://doi.org/10.5194/os-6-269-2010 |
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HAL Sorbonne Université |
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English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Penduff, Thierry Juza, Mélanie Brodeau, Laurent Smith, Gregory C. Barnier, Bernard Molines, Jean-Marc Tréguier, Anne-Marie Madec, Gurvan Impact of global ocean model resolution on sea-level variability with emphasis on interannual time scales |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Four global ocean/sea-ice simulations driven by the same realistic 47-year daily atmospheric forcing were performed by the DRAKKAR group at 2°, 1°, ½°, and ¼° resolutions. Simulated mean sea-surface heights (MSSH) and sea-level anomalies (SLA) are collocated over the period 1993-2004 onto the AVISO dataset. MSSH fields are compared with an inverse estimate. SLA datasets are filtered and compared over various time and space scales with AVISO regarding three characteristics: SLA standard deviations, spatial correlations between SLA variability maps, and temporal correlations between observed and simulated band-passed filtered local SLA timeseries. Beyond the 2°−1° transition whose benefits are moderate, further increases in resolution and associated changes in subgrid scale parameterizations simultaneously induce (i) strong increases in SLA standard deviations, (ii) strong improvements in the spatial distribution of SLA variability, and (iii) slight decreases in temporal correlations between observed and simulation SLA timeseries. These 3 effects are not only clear on mesoscale (14-180 days) and quasi-annual (5-18 months) fluctuations, but also on the slower (interannual), large-scale variability ultimately involved in ocean-atmosphere coupled processes. Most SLA characteristics are monotonically affected by successive resolution increases, but irregularly and with a strong dependance on frequency and latitude. Benefits of enhanced resolution are greatest in the 1°−½° and ½°−¼° transitions, in the 14-180 day range, and within eddy-active mid- and high-latitude regions. In the real ocean, most eddy-active areas are characterized by a strong SLA variability at all timescales considered here; this localized, broad-banded temporal variability is only captured at ¼° resolution. |
author2 |
Laboratoire des Écoulements Géophysiques et Industriels Grenoble (LEGI) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS) Department of Oceanography Florida State University Tallahassee (FSU) National Oceanography Centre Southampton (NOC) University of Southampton Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Penduff, Thierry Juza, Mélanie Brodeau, Laurent Smith, Gregory C. Barnier, Bernard Molines, Jean-Marc Tréguier, Anne-Marie Madec, Gurvan |
author_facet |
Penduff, Thierry Juza, Mélanie Brodeau, Laurent Smith, Gregory C. Barnier, Bernard Molines, Jean-Marc Tréguier, Anne-Marie Madec, Gurvan |
author_sort |
Penduff, Thierry |
title |
Impact of global ocean model resolution on sea-level variability with emphasis on interannual time scales |
title_short |
Impact of global ocean model resolution on sea-level variability with emphasis on interannual time scales |
title_full |
Impact of global ocean model resolution on sea-level variability with emphasis on interannual time scales |
title_fullStr |
Impact of global ocean model resolution on sea-level variability with emphasis on interannual time scales |
title_full_unstemmed |
Impact of global ocean model resolution on sea-level variability with emphasis on interannual time scales |
title_sort |
impact of global ocean model resolution on sea-level variability with emphasis on interannual time scales |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.science/hal-00494985 https://hal.science/hal-00494985/document https://hal.science/hal-00494985/file/os-6-269-2010.pdf https://doi.org/10.5194/os-6-269-2010 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
ISSN: 1812-0784 EISSN: 1812-0792 Ocean Science https://hal.science/hal-00494985 Ocean Science, 2010, 6, pp.269-284. ⟨10.5194/os-6-269-2010⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/os-6-269-2010 hal-00494985 https://hal.science/hal-00494985 https://hal.science/hal-00494985/document https://hal.science/hal-00494985/file/os-6-269-2010.pdf doi:10.5194/os-6-269-2010 WOS: 000276175700019 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/os-6-269-2010 |
container_title |
Ocean Science |
container_volume |
6 |
container_issue |
1 |
container_start_page |
269 |
op_container_end_page |
284 |
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1799466629604573184 |
spelling |
ftsorbonneuniv:oai:HAL:hal-00494985v1 2024-05-19T07:48:24+00:00 Impact of global ocean model resolution on sea-level variability with emphasis on interannual time scales Penduff, Thierry Juza, Mélanie Brodeau, Laurent Smith, Gregory C. Barnier, Bernard Molines, Jean-Marc Tréguier, Anne-Marie Madec, Gurvan Laboratoire des Écoulements Géophysiques et Industriels Grenoble (LEGI) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS) Department of Oceanography Florida State University Tallahassee (FSU) National Oceanography Centre Southampton (NOC) University of Southampton Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 2010 https://hal.science/hal-00494985 https://hal.science/hal-00494985/document https://hal.science/hal-00494985/file/os-6-269-2010.pdf https://doi.org/10.5194/os-6-269-2010 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/os-6-269-2010 hal-00494985 https://hal.science/hal-00494985 https://hal.science/hal-00494985/document https://hal.science/hal-00494985/file/os-6-269-2010.pdf doi:10.5194/os-6-269-2010 WOS: 000276175700019 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1812-0784 EISSN: 1812-0792 Ocean Science https://hal.science/hal-00494985 Ocean Science, 2010, 6, pp.269-284. ⟨10.5194/os-6-269-2010⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2010 ftsorbonneuniv https://doi.org/10.5194/os-6-269-2010 2024-04-25T04:16:22Z International audience Four global ocean/sea-ice simulations driven by the same realistic 47-year daily atmospheric forcing were performed by the DRAKKAR group at 2°, 1°, ½°, and ¼° resolutions. Simulated mean sea-surface heights (MSSH) and sea-level anomalies (SLA) are collocated over the period 1993-2004 onto the AVISO dataset. MSSH fields are compared with an inverse estimate. SLA datasets are filtered and compared over various time and space scales with AVISO regarding three characteristics: SLA standard deviations, spatial correlations between SLA variability maps, and temporal correlations between observed and simulated band-passed filtered local SLA timeseries. Beyond the 2°−1° transition whose benefits are moderate, further increases in resolution and associated changes in subgrid scale parameterizations simultaneously induce (i) strong increases in SLA standard deviations, (ii) strong improvements in the spatial distribution of SLA variability, and (iii) slight decreases in temporal correlations between observed and simulation SLA timeseries. These 3 effects are not only clear on mesoscale (14-180 days) and quasi-annual (5-18 months) fluctuations, but also on the slower (interannual), large-scale variability ultimately involved in ocean-atmosphere coupled processes. Most SLA characteristics are monotonically affected by successive resolution increases, but irregularly and with a strong dependance on frequency and latitude. Benefits of enhanced resolution are greatest in the 1°−½° and ½°−¼° transitions, in the 14-180 day range, and within eddy-active mid- and high-latitude regions. In the real ocean, most eddy-active areas are characterized by a strong SLA variability at all timescales considered here; this localized, broad-banded temporal variability is only captured at ¼° resolution. Article in Journal/Newspaper Sea ice HAL Sorbonne Université Ocean Science 6 1 269 284 |